[Freeswitch-users] T38 unsuccessful: result (48) Disconnected after permitted retries

[samuel]

hi all,

recently testing T.38 unsuccesfully with freeswitch head version (FreeSWITCH
Version 1.0.head (git-) ) on a testing server (2.6.26-2-xen-amd64)

remote SDP:

v=0
o=root 6039 6040 IN IP4 A.B.C.D
s=session
c=IN IP4 A.B.C.D
t=0 0
m=image 19423 udptl t38
a=T38FaxVersion:0
a=T38MaxBitRate:9600
a=T38FaxFillBitRemoval:0
a=T38FaxTranscodingMMR:0
a=T38FaxTranscodingJBIG:0
a=T38FaxRateManagement:transferredTCF
a=T38FaxMaxBuffer:72
a=T38FaxMaxDatagram:72
a=T38FaxUdpEC:t38UDPRedundancy

freeswitch answer:
v=0
o=FreeSWITCH 1276579579 1276579581 IN IP4 W.X.Y.Z
s=FreeSWITCH
c=IN IP4 W.X.Y.Z
t=0 0
m=image 22230 udptl t38
a=T38FaxVersion:0
a=T38MaxBitRate:14400
a=T38FaxFillBitRemoval
a=T38FaxRateManagement:transferredTCF
a=T38FaxMaxBuffer:2000
a=T38FaxMaxDatagram:400
a=T38FaxUdpEC:t38UDPRedundancy
a=T38VendorInfo:0 0 0


some debug:
2010-06-15 13:37:13.234961 [DEBUG] mod_spandsp_fax.c:271 FLOW T.30 T4
expired in phase T30_PHASE_B_RX, state 17
2010-06-15 13:37:13.234961 [DEBUG] mod_spandsp_fax.c:271 FLOW T.30 Too many
retries. Giving up.
2010-06-15 13:37:13.234961 [DEBUG] mod_spandsp_fax.c:271 FLOW T.30 Changing
from phase T30_PHASE_B_RX to T30_PHASE_D_TX
2010-06-15 13:37:13.234961 [DEBUG] mod_spandsp_fax.c:271 FLOW T.38T Set rx
type 0
2010-06-15 13:37:13.234961 [DEBUG] mod_spandsp_fax.c:271 FLOW T.38T Set tx
type 4
2010-06-15 13:37:13.234961 [DEBUG] mod_spandsp_fax.c:271 FLOW T.30 Changing
from state 17 to 3
2010-06-15 13:37:13.234961 [DEBUG] mod_spandsp_fax.c:271 FLOW T.30 Tx:  DCN
with final frame tag
2010-06-15 13:37:13.234961 [DEBUG] mod_spandsp_fax.c:271 FLOW T.30 Tx:  ff
13 fa
2010-06-15 13:37:14.406960 [DEBUG] mod_spandsp_fax.c:271 FLOW T.30 Send
complete in phase T30_PHASE_D_TX, state 3
2010-06-15 13:37:14.406960 [DEBUG] mod_spandsp_fax.c:271 FLOW T.30 Send
complete in phase T30_PHASE_D_TX, state 3
2010-06-15 13:37:14.406960 [DEBUG] mod_spandsp_fax.c:271 FLOW T.30
Disconnecting
2010-06-15 13:37:14.406960 [DEBUG] mod_spandsp_fax.c:271 FLOW T.30 Changing
from phase T30_PHASE_D_TX to T30_PHASE_E
2010-06-15 13:37:14.406960 [DEBUG] mod_spandsp_fax.c:271 FLOW T.38T Set rx
type 0
2010-06-15 13:37:14.406960 [DEBUG] mod_spandsp_fax.c:271 FLOW T.38T Set tx
type 1
2010-06-15 13:37:14.406960 [DEBUG] mod_spandsp_fax.c:271 FLOW T.30 Changing
from state 3 to 2
2010-06-15 13:37:15.634931 [DEBUG] mod_spandsp_fax.c:271 FLOW T.30 Send
complete in phase T30_PHASE_E, state 2
2010-06-15 13:37:15.634931 [DEBUG] mod_spandsp_fax.c:301
==============================================================================
2010-06-15 13:37:15.634931 [DEBUG] mod_spandsp_fax.c:313 Fax processing not
successful - result (48) Disconnected after permitted retries.
2010-06-15 13:37:15.634931 [DEBUG] mod_spandsp_fax.c:318 Remote station id:
2010-06-15 13:37:15.634931 [DEBUG] mod_spandsp_fax.c:319 Local station id:
SpanDSP Fax Ident
2010-06-15 13:37:15.634931 [DEBUG] mod_spandsp_fax.c:320 Pages transferred:
0
2010-06-15 13:37:15.634931 [DEBUG] mod_spandsp_fax.c:322 Total fax pages:
0
2010-06-15 13:37:15.634931 [DEBUG] mod_spandsp_fax.c:323 Image resolution:
0x0
2010-06-15 13:37:15.634931 [DEBUG] mod_spandsp_fax.c:324 Transfer Rate:
14400
2010-06-15 13:37:15.634931 [DEBUG] mod_spandsp_fax.c:326 ECM status
off

I've starting learning about T3X and freswitch so I would like whether
someone can point me to any doc or any configuration parameter that can
solve the issue or at least debug it.

Thanks in advance,

Samuel
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